Expansible reamer.



L. BAUM.

EXPANSIBLE REAMER. APPLIOATION FILED 13110.11, 1912.

. r. 2 BHEETSSHEET 1.

7 Patented Nov. 25, 1913.

\ L. BAUM. EXPANSIBLE REAMER. APPLICATION FILED 21:0.17, 1912.

1 79 3 Patented Nov. 25, 1918.

2 SHEETS-SHEET 2.

Suva V001 6mm [0Z4 m flaunt use TPANT mos.

LOVES BATJM, F PATERQON, NEW JERSEY.

' mrrsiisisns REAMER.

specification of Letters Patent.

- Patented Nov. 215, 1913.

n trification filed'tlssumbsfl'i, 1912. Serial emanate.

useful lniprovements in Expsnsible Reamers. of which the following is e specification;

. v--lliis invention relates to improvements in reumers and more particularly to expansible reeiners which may be easily adjusted to fit ditferent bores and which may be securely locked in their adjusted positions.

The primsryobject of the invention re-.

sides in the provision of a tool of this ns ture, which will be of extremely simple construction, cheap to manufacture, strong-durable, and easy to adjust.

The invention also aims to generally im- I'Jl 'JvBj LOO iS of this nature to render them more useful and commercially desirable.

JVith these and other objects in view as will become more apparent as the description proceeds, the invention consists in cer tuin hovel features of construction, combination, and arrangement of parts, as will be hereinafter described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drewing, in which,

1. is a side elevation of my inveni ur '2 l3 s, sectional view taken upon tic-n, Fig.

e elevation showing the sgsirnl thread n he spindle flange, B 1g. t is on end P. his he cylindrical heed showing cunt therein, the spindle being shou .n sectiomliig. is a. perspective of one of the cutters, and, Fig. 6 is an elevation of my invention complete.

the following description. and accompanying drawings, similar parts will be rc- A to and designated by like reference in detail to the drawings by ll desigimtes e spindle enlarged, as 'ormed with the annular flange 3,

L i a spiral thread 4:. The portion oi the spindle which extends beyond the is of it reduced diameter, as clearly a d is threaded adjacentits lune oi line of Fig. 6, Fig. 3 is an being provided upon its outer;

portion 5 of the spindle. The head 6 is of e 'reduceddiumeter adjacent its outer end, as

indicated at 7, vand said reduced portion is formed with a plurality of sockets 8 to re ceive a spanner wrench when it is desired.

to rotate said head upon the spindle. A preferably bronze bushingt) is fitted within the bore of the heed 6 and terminates short of the outerisco thereof, as clearlyshown in Fig. 2. ,A loch nut 10 having an internally threaded portion 11 is employed to lock the head against rotation relative to the-spindle. The portion ll) of said nut threads upon the end of the spindle between the sameund Ashe reduced portion 7 of the head.

The head is formed with a plurality of radial slots 12, which open upon the periphery and the inner face of the some. WithlIl these slots are positioned cutters 13, formed with the segmental threads 14 of the some pitch as the thread 4 and adapted to engage the same. If desired, the cutters may be marked with some arbitrary symbols, such as A, B, C, etc, and the cutter head 6 may be correspondingly marked on its perip ery so as to indicate into which slots the respective cutters fit. This marking. will greatly facilitate the assembling of the tool. The periphery of the flange 3 may be graduated if desired, as shown in Fig. 1, so. as to assist in determining the adjustment of the cutters.

To adjust the cutters, the nut 10 is first loosened-end the head 6 rotute'd in the required direction. A rotation. in one direction will move the cutters outwardly whereas a rotation in a reverse direction will draw the cutters inwardly toward the spindle. When the proper adjustment has been made, the nut 10 is again ti htened, which locks the cutters. .in their a. justed positions. It will be noted that the head 6 provides an excellent guide for the cutters l3 and that the spiral thread l co-acts with the segmental; threads it in such a manner as to permit a. very fine adjustment being made,

It is to be understood that my improved reamer may be made in various sizes for use with different kinds of work and that) I may also make changes in the construction, combination, and arrangement of parts, r0.- vided I do not depart from the scope o the claims. 1 j

Having thus described my invention, I claim is '1. An expansible reumer, comprising a,

a ing' provided upon its outer face With a sgindle' having an annular flange forlned t ereon intermediate its ends, sa1d.fiange hespiral thread, the spindle being of a reduced diameter upon one side of said flange, a head mounted for revolution upon said reduced spindle portion, said head being of a reduced diameter adjacent its outer end and formed with socket openings to receive a spanner wrench, the head being also formed with a plurality of radial slots, cutters sliding spindle having an annular flange formed intsegral therewith, said flange being provided upon its outer face with a spiral thread, the

sp ndle being reduced adjacent its outer end, at cad having an external diameter equal to said flange, the head being reduced in diameter adjacent its outer end and formed with sockets adapted to receive a spanner wrench, a bushing fitted Within the bore 'of said head and terminating short of the outer end thereof, said bushing being revoluble upon the spindle, a plurality of cutters movable within radial slots formed in said head, the cutters being provided with segmental threads for engagement with said spiral thread, and a locking nut threaded. upon the extremity of said spindle between the same and the head, said nut bearing against the outer face of the head.

In testimony whereof I aflix my signature in presence of two witnesses.

LOUIS BAUM.

Witnesses:

GARRET VAN CLEVE, P. A. *vVEsTEnvnLT. 

